[Bug 294172] The process using Vulkan stays in a yield state for a very long time when it receives SIGINT

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294172

            Bug ID: 294172
           Summary: The process using Vulkan stays in a yield state for a
                    very long time when it receives SIGINT
           Product: Base System
           Version: 15.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: yuri@freebsd.org

How to reproduce:

1. Make sure you have a working Vulkan device: 'vulkaninfo --summary' shows
such hardware (not software) GPU.
2. Install the latest revision of the port misc/ollama
3. Run 'sudo service ollama onestart' to start the ollama service
4. Run 'ollama run qwen2:0.5b' (the smallest available model)
5. Say something like 'hello' and wait for it to respond
6. Press Ctrl-D to exit the ollama client
7. Run 'sudo service ollama onestop' to stop the ollama service
8. The latter command doesn't exit right away. It remains in the yield state
for a minute or more.

The Vulkan device that I am experiencing this problem with is NVIDIA GeForce
RTX 2060.

There is no reason for a command to linger like this.

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